The challenge there is that ISIL doesn't have an air force, so the damage done there is not against ISIL, it's against the Syrian regime.

The easiest way to save money is to waste less energy.

America’s possibilities are limitless, for we possess all the qualities that this world without boundaries demands: youth and drive; diversity and openness; an endless capacity for risk and a gift for reinvention. My fellow Americans, we are made for this moment, and we will seize it - so long as we seize it together.

We seem to have trouble with [critical thinking]. And our political system doesn't help.

We think about the enormous costs of homelessness, or the enormous cost of HIV/AIDS, over the long term, as people visit emergency rooms, etc. The more we are investing in that ounce of prevention the better off we're going to be.

What we can do is make sure that Afghanistan is not a safe haven for Al Qaeda. What we can do it make sure that it is not destabilizing neighboring Pakistan, which has nuclear weapons. The key is we’ve got to have a clear objective...

It is my judgment that had I spent the first two years trying to get a single-payer system, all those folks who now have health insurance that didn't have it would still be uninsured. And those are millions of people whose lives are impacted right now.